idontknowwhatiamdoing Posted March 4, 2021 Share Posted March 4, 2021 A apex roof has been constructed with Klober breathable underlay that has been fixed to the outside of the roof. Do I need another layer inside the rafters between the insulation and the sarking, or vapor control layer? The roof will be fitted with 150mm thick insulation (Ecotherm PIR, or Actis Hybris) Note the roof is built on a 800mm thick cottage rock wall (granite) Link to comment Share on other sites More sharing options...
idontknowwhatiamdoing Posted March 7, 2021 Author Share Posted March 7, 2021 Bump I investigated the Klober underlay and it is the best one with a breathable layer. So I guess I can just put insulation straight on under the sarking? Link to comment Share on other sites More sharing options...
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